I encountered almost exactly this situation. Here was my solution to keep code simple and avoid the excessive hit. 
$obj->log_on_error{sub {Dumper($some_very_large_structure)});

[download]
The standard logging modules may not provide this functionality though.

In reply to Re^3: "Accessors (don't always) break encapsulation" by tilly
in thread "Accessors break encapsulation"? by tlm

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